Re: [PATCH] SUNRPC: Add a check for gss_release_msg

From: Greg KH
Date: Tue Apr 20 2021 - 03:15:37 EST


On Tue, Apr 06, 2021 at 07:16:56PM -0500, Aditya Pakki wrote:
> In gss_pipe_destroy_msg(), in case of error in msg, gss_release_msg
> deletes gss_msg. The patch adds a check to avoid a potential double
> free.
>
> Signed-off-by: Aditya Pakki <pakki001@xxxxxxx>
> ---
> net/sunrpc/auth_gss/auth_gss.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
> index 5f42aa5fc612..eb52eebb3923 100644
> --- a/net/sunrpc/auth_gss/auth_gss.c
> +++ b/net/sunrpc/auth_gss/auth_gss.c
> @@ -848,7 +848,8 @@ gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
> warn_gssd();
> gss_release_msg(gss_msg);
> }
> - gss_release_msg(gss_msg);
> + if (gss_msg)
> + gss_release_msg(gss_msg);a

If you look at the code, this is impossible to have happen.

Please stop submitting known-invalid patches. Your professor is playing
around with the review process in order to achieve a paper in some
strange and bizarre way.

This is not ok, it is wasting our time, and we will have to report this,
AGAIN, to your university...

greg k-h